Tube forming device



July 24, 1962 J. P. Lo Russo 3,045,563

TUBE FORMING DEVICE `.L P. o Russo 3,045,563

TUBE FORMING DEVICE July 24, 1962 2 Sheets-Sheet 2 Filed June 24, 1960INVENTOR. JOSEPHRLO RUSSO ATTRNEY United States Patent O 3,045,563 TUBEFORMING DEVICE Joseph P. Lo Russo, Canfield St., Stanhope, NJ. FiledJune 24, 1960, Ser. No. 38,498 1 Claim. (Cl. 93-82) This inventionconcerns a tube forming device.

The invention is adaptable to roll a single or multiple layer tube withor without a central core. 'In one application of ythe invention, thedevice is employed to roll a kraft paper tube with a waxed paper linerand with a pyrotechnic fuse core. l

One object of the invention is to provide a tube forming device'in whichone or more liap strips of sheet material are drawn through laslrccess'ion of eyelets or rings of progressively decreasing diameteruntil a complete cylindrical tube is formed.

A further object is to provide means for gluing an outer edge of therolled strips to secure the strips in rolled, tubular form.

Still another object is provision of a device in which a strip of sheetmaterial may =be drawn manually or mechanically for forming ta rolledtube of indelinite length.

For further comprehension of the invention, and of the objects andadvantages thereof, reference will be had tothe following descriptionand accompanying drawings, and to the .appended claim in which thevarious novel features of the invention are more particularly set forth.

In the accompanying drawings forming a material part of this disclosure:s

FIG. 1 is a perspective View of a device embodying the invention.

` FIG. 2 is a side elevational View, partly in section, of the device.

FIG. 3 through FIG. 8, and FIG. 11 are sectional views of the devicetaken on lines 3-3 through -8-8 and 11-11, respectively, of FIG. 2. I

FIG. 9 is a sectional view on an enlarged scale taken on line 9-9 ofFIG. 2.

FIG. 10 is 'a sectional view on an enlarged scale taken on line 10-10 ofFIG. 1.

FIG. 12 is a perspective view of a portion of a tube formed according tothe invention.

Referring to the drawings, there is shown a flat platform 20 providedwith an upstanding ridge 22 to which is riveted or welded the bottomends of a plurality of posts '30-46 The upper ends of posts 31-33 arecurved or curled progressively to Ia greater circular circumferentialextent at 31 to 33', so that end 33' defines a substantially completering. The upper ends of posts 34-42 form comple-te rings 34'-42- ofprogressively smaller diameter. Post 43 has a laterally directed uppercurved end 43 laterally directed in the direction of rolling of tube Tshown advanced in the device in solid lines as far as ring 33'. Post 44has -an oppositely directed upper end 44' for la purpose to be describedlater. Post 45 supports 'a shor-t cylindrical tube `45 yand post 46mounts a short cylindrical tube `46' which terminates in a constrictedcylindrical arrangement of spring fingers Sil.

Between posts 43 and v44 is a glue pot 52 in which, is fitted a plate 54formed with a plurality of nozzles 56 through which glue G may bedischarged upon `a tube being drawn past the pot. The pot is supportedon post y 3,045,563 Patented July Z4, 1962 53. A material guide 60 issupported by posts 3ft-42. This guide is formed from a generallytriangular pierce of metal bent to U-shaped cross section for its entirelength from base to apex. The side walls of the guide are thus ofprogressively decreasing height from the base end 62 to the apical end64. The guide thus denes a trough with open top land closed roundedbottom.

Guide 60 serves as ya support land guide for strips 66 land 68 which arefed from rolls 70, 72 carried on reels 71, 73 and spindles 74, 76. Thespindles are supported on a crossbar 80 secured to platform 20 and ridge22. Another spindle 82 carries a reel 84 Wound with la cord S6 whichforms a core of the tube T rolled in the device. Guide posts 61, 63 aredisposed on opposite sides of ridge 22 in yadvance of platform 60.

In operation of the device, strips 66 yand 68 yare threaded betweenguide posts 61, 63 and into the guide 60. Post ends SIL-33 graduallyAcurl or roll the upper juxtaposed edges of the strips 66, 68 -tocylindrical form as shown in FIGS. l fand 2. Strip 66 is shown narrowerthan strip '68. `Cord 86 is drawn olf of reel 84 Iand passes into thecurling ring 3-3. There the cord is enclosed by the curled posts formingtube T. The tube T is then drawn through rings 34 to 42 in successionwhich effect a gradually tighter roll of the tube. At post end 43' thefree edge E of the tube is held separate from the body of the tube sothat glue G `can be deposited in Ia line on the outer side of the tubethrough nozzles 56; see FIGS. 11 and 12.

`Curled end `44 of post 44 serves to press the free edge E of the tubedown on the deposited glue. Short tubes 45 and 46 effect furthercylindrical compression of the tube and the constriction defined atlingers 50 complete the compression of the tube around cord 86. Thetube, which extends out of constriction 50 at T', can be graspedmanually and pulled axially. This will serve to provide the force forcontinuously drawing the strips 66 and 68 and cord 86 olf of the rollsand reel. If desired, this free end T can be engaged on a motor drivenreel (not shown) for ldrawing and forming the tube T continuously andautomatically until the rolls 70 and 72 .and cord 86 on reels 71, 73, 84are exhausted. If desired, cord 86 can be omitted to form a tube T Withhollow center. form tube T from a single strip 68. When forming a fusefor pyrotechnic use, strip 66 may be made of waxed paper yand strip 68m-ay be made of kraft paper, while core 86 consists of ignitablematerial.

While I have illustrated and described the preferred embodiment of myinvention, it is to be understood that I do not limit myself to theprecise construction herein disclosed and that various changes andmodifications may be made within the scope of the invention as definedin the appended claim.

Having thus described my invention, what I claim as new, tand desire tosecure by United States Letters Patent is:

A device for forming a tube from strip sheet material on reels,comprising 1a support, ra series of spaced upright posts on saidsupport, said posts having curved ends of progressively greatercircumferential extent for curling the strip material manually fedtherethrough, another series of spaced posts, having portions definingrings of progressively smaller diameter in axial alignment on Strip 66could also be omitted to said support for shaping the curled stripmaterial manually fed therethrough into a tube of predetermineddiameter, an elongated tapered member U-shaped in cross section forguiding the material manually fed through said curved ends and ringsmounted on said posts, still another post with curved end on the supportbeyond said rings for holding a free edge of the tube spaced from theexterior thereof, a glue pot on the support having nozzles disposed toapply glue to the exterior of the tube in a line adjacent to said freeedge, yand another post with curved end for pressing the free edge ofthe tube against the applied glue along said line, and a plurality ofshort tubes disposed in alignment for eiecting compression of the Itubeto seal said free edge to the tube, one of the short tubes having an endformed with spring fingers disposed in a constricted ring to shape theglued tube to minimum diameter.

References Cited in the le of this patent UNITED STATES PATENTS 25,007Gomez Aug. 9, 1859 809,846 Sacksenroder Jan. 9, 1906 1,898,360 GioiosaFeb. 21, 1933 2,651,952 Leavenworth Sept. 15, 1953 2,759,219 Meakin Aug.21, 1956

